Anti-precipitation coal slurry tank structure

Abstract

The utility model relates to the technical field of coal slurry tanks, in particular to an anti-precipitation coal slurry tank structure. The anti-precipitation coal slurry tank structure comprises a coal slurry tank for storing coal slurry, a slurry outlet pipe is mounted on the coal slurry tank, a rotational flow structure is mounted in the coal slurry tank and comprises a plurality of mounting seats which are annularly arrayed at the inner bottom of the coal slurry tank, and a centrifugal pump is fixedly mounted on each mounting seat through a bolt; the input end and the output end of the centrifugal pump are connected with a material suction pipe and a material conveying pipe respectively, the material conveying pipe extends upwards along the inner wall of the coal slurry tank, the end of the material conveying pipe is closed, a plurality of nozzles which are vertically arranged and distributed are fixedly installed on the material conveying pipe, and a port of the material suction pipe and ports of the nozzles face opposite directions. According to the coal slurry tank, the reverse stirring of the auxiliary stirring structure and the forced vortex of the rotational flow structure form a synergistic effect, so that the full-space circulation of coal slurry from the tank bottom to the liquid level is realized, the uniform concentration of the coal slurry at each part in the coal slurry tank is ensured, and the problem of chromatographic precipitation of the coal slurry during traditional static storage is solved.

Description

Technical Field

[0001] This utility model relates to the field of coal slurry tank technology, and in particular to an anti-sedimentation coal slurry tank structure. Background Technology

[0002] A coal slurry tank is a device used to store, mix, or transport coal slurry. It is commonly used in industrial processes such as coal processing, coal-water slurry preparation, gasification, or combustion. As a storage container for coal slurry, it provides a continuous and stable supply of coal slurry for subsequent production processes such as gasification and combustion, and buffers the time and flow differences between coal slurry preparation and use.

[0003] Traditional coal slurry tanks generally use a single mechanical stirring method. Traditional stirring is prone to concentration fluctuations during pumping, resulting in pulsation. At the same time, it has poor adaptability to the stirring effect of low-quality additives, and its fast settling speed makes it more prone to precipitation. When the coal slurry is in a static storage state, due to the gravity of the coal particles, a hard sediment layer is easily formed at the bottom. This sediment layer has a dense structure and is difficult to redisperse by conventional stirring, resulting in stratification of the coal slurry. This directly affects the stability of subsequent processes, such as reduced gasification efficiency and incomplete combustion.

[0004] Therefore, it is necessary to provide a new anti-sedimentation coal slurry tank structure to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a new anti-sedimentation coal slurry tank structure.

[0006] The anti-sedimentation coal slurry tank structure provided by this utility model includes: a coal slurry tank for coal slurry storage and an auxiliary stirring structure. A slurry outlet pipe is installed on the coal slurry tank, and a vortex structure is installed in the coal slurry tank. The vortex structure includes multiple mounting seats arranged in a ring at the bottom of the coal slurry tank. A centrifugal pump is fixedly installed on each mounting seat by bolts. The input end and output end of the centrifugal pump are respectively connected to a suction pipe and a delivery pipe. The delivery pipe extends upward along the inner wall of the coal slurry tank and is closed at the end. Multiple vertically arranged nozzles are fixedly installed on the delivery pipe, and the suction pipe port and the nozzle port face opposite directions.

[0007] Preferably, the auxiliary stirring structure further includes a drive shaft rotatably connected to the center of the bottom of the coal slurry tank, a plurality of stirring blades arranged in a ring are fixedly installed on the drive shaft, a drive motor is fixedly installed at the bottom of the coal slurry tank, and the drive shaft is fixedly connected to the output end of the drive motor.

[0008] Preferably, the drive shaft is fitted with two sealing gaskets that respectively fit against the inner bottom wall and the outer bottom wall of the coal slurry tank.

[0009] Preferably, the lower part of the conveying pipe is suspended in the air, and the upper part of the conveying pipe is fixedly installed on the inner wall of the coal slurry tank.

[0010] Preferably, the suction pipe is suspended and its port is tilted towards the bottom wall of the coal slurry tank.

[0011] Preferably, a removable large mesh filter cover is installed at the port of the suction pipe.

[0012] Preferably, the inner diameter of the nozzle gradually decreases at the end away from the conveying pipe, and the nozzle forms a tangential angle of 5-10 degrees with the inner wall of the coal slurry tank.

[0013] Preferably, a waste discharge pipe is fixedly installed at the bottom of the coal slurry tank and communicates with its inner bottom, and the waste discharge pipe is connected to the slurry outlet pipe through a connecting pipe, and valves are installed on both the waste discharge pipe and the connecting pipe.

[0014] Compared with related technologies, the anti-sedimentation coal slurry tank structure provided by this utility model has the following beneficial effects:

[0015] This invention achieves full-space circulation of coal slurry from the bottom of the tank to the surface by combining the reverse stirring of the auxiliary stirring structure with the forced vortex of the swirl structure. This ensures uniform coal slurry concentration in all parts of the tank and solves the problem of chromatographic precipitation of coal slurry during traditional static storage. Attached Figure Description

[0016] Figure 1 A schematic diagram of a preferred embodiment of the anti-sedimentation coal slurry tank structure provided by this utility model;

[0017] Figure 2 for Figure 1 The diagram shows the structure of the bottom of the coal slurry tank.

[0018] Figure 3 for Figure 1 A top view of the coal slurry tank is shown.

[0019] Figure 4 for Figure 1 The diagram shows the structure of the swirling flow.

[0020] Figure 5 for Figure 3 The diagram shows the structure of the auxiliary stirring structure.

[0021] Figure 6 for Figure 4 The diagram shows the structure of the suction tube.

[0022] The following are the labels in the diagram: 1. Coal slurry tank; 2. Slurry outlet pipe; 3. Swirl structure; 31. Mounting base; 32. Centrifugal pump; 33. Suction pipe; 331. Large mesh filter cover; 34. Conveying pipe; 35. Nozzle; 4. Auxiliary stirring structure; 41. Drive shaft; 42. Stirring blades; 43. Drive motor; 44. Sealing gasket; 5. Waste discharge pipe; 6. Connecting pipe; 7. Valve. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0025] Please see Figures 1 to 6 This utility model provides an anti-sedimentation coal slurry tank structure, which includes a coal slurry tank 1 for coal slurry storage and an auxiliary stirring structure 4. A slurry outlet pipe 2 is installed on the coal slurry tank 1, and a vortex structure 3 is installed in the coal slurry tank 1. The vortex structure 3 includes multiple mounting seats 31 arranged in a ring at the bottom of the coal slurry tank 1. A centrifugal pump 32 is fixedly installed on each mounting seat 31 by bolts. The input end and output end of the centrifugal pump 32 are respectively connected to a suction pipe 33 and a conveying pipe 34. The conveying pipe 34 extends upward along the inner wall of the coal slurry tank 1 and is closed at the end. Multiple vertically arranged nozzles 35 are fixedly installed on the conveying pipe 34. The ports of the suction pipe 33 and the nozzles 35 face opposite directions. An auxiliary stirring structure 4 is installed at the bottom of the coal slurry tank 1. The auxiliary stirring structure 4 includes stirring blades 42 for stirring the coal slurry at the center of the bottom.

[0026] It should be noted that during use, the auxiliary stirring structure 4 and the vortex structure 3 of this utility model are activated, and the centrifugal pump 32 is started. Multiple centrifugal pumps 32 in a ring array draw coal slurry from the bottom of the coal slurry tank 1 through the suction pipe 33. After being pressurized by the conveying pipe 34, the coal slurry is jetted out from the nozzles 35 arranged along the tank wall. Multiple sets of nozzles 35 work together to form a superimposed vortex field. After the coal slurry spirals up to the liquid surface along the tank wall, it settles towards the center under the action of gravity. The stirring blades 42 in the auxiliary stirring structure 4 rotate in the opposite direction to the coal slurry vortex formed by the vortex structure 3, which disperses the coarse coal particles that have settled to the bottom of the tank and re-entrains them into the vortex zone, thus achieving the stirring of the coal slurry. This utility model achieves the full-space circulation of coal slurry from the bottom of the tank to the liquid surface through the synergistic effect of the reverse stirring of the auxiliary stirring structure 4 and the forced vortex of the vortex structure 3, ensuring that the coal slurry concentration in each part of the coal slurry tank 1 is uniform and solving the problem of chromatographic precipitation of coal slurry during traditional static storage.

[0027] Preferably, a waste discharge pipe 5 is fixedly installed at the bottom of the coal slurry tank 1, communicating with its inner bottom, and the waste discharge pipe 5 is connected to the slurry outlet pipe 2 via a connecting pipe 6. Valves 7 are installed on both the waste discharge pipe 5 and the connecting pipe 6. When the coal slurry tank 1 is discharging slurry at a low level or cleaning and discharging waste, the following operations are performed:

[0028] Close the connecting pipe 6 by valve 7, open the waste discharge pipe 5, and at the same time rinse the inner wall of the coal slurry tank 1 with clean water. The wastewater is discharged through the waste discharge pipe 5. Before cleaning the coal slurry tank 1, the coal slurry inside the coal slurry tank 1 needs to be drained. Close the valve 7 on the waste discharge pipe 5 and open the valve on the connecting pipe 6. The coal slurry will enter the slurry outlet pipe 2 from the bottom of the coal slurry tank 1 through the connecting pipe 6 and be discharged.

[0029] Furthermore, the coal slurry level inside the coal slurry tank 1 is generally maintained within a certain range. The part connecting the slurry outlet pipe 2 and the coal slurry tank 1 is roughly located at the middle to high position of the coal slurry level, which is conducive to the discharge operation of coal slurry with uniform and appropriate concentration, and facilitates subsequent processing. If the coal slurry concentration in the coal slurry tank 1 is relatively uniform, for example, the coal slurry concentration in various parts of the coal slurry tank 1 in this utility model is relatively uniform, the slurry outlet pipe 2 can be placed at the lower position of the coal slurry tank 1 for the discharge operation. It can also be used in conjunction with the waste discharge pipe 5, the connecting pipe 6 and the valve 7 to discharge the coal slurry at the bottom.

[0030] Preferably, the inner diameter of the end of the nozzle 35 away from the conveying pipe 34 gradually decreases, and the nozzle 35 forms a tangential angle of 5-10 degrees with the inner wall of the coal slurry tank 1; this increases the coal slurry ejection rate and avoids the ejected coal slurry directly impacting the inner wall of the coal slurry tank 1.

[0031] Preferably, the lower part of the conveying pipe 34 is suspended, and the upper part of the conveying pipe 34 is fixedly installed on the inner wall of the coal slurry tank 1; the suspended lower part of the conveying pipe 34 can achieve a certain turbulence effect and improve the mixing effect of the coal slurry, while the fixed installation of the upper part inside the coal slurry tank 1 ensures the installation stability of the conveying pipe 34.

[0032] The suction pipe 33 is suspended and its port is tilted towards the bottom wall of the coal slurry tank 1; so that the port of the suction pipe 33 faces the bottom coal slurry, ensuring that the coal slurry deposited at the bottom is sucked up; a detachable large mesh filter cover 331 is installed at the port of the suction pipe 33; to filter the sucked coal slurry and prevent coarse coal particles from being sucked up and causing blockage of the vortex structure 3.

[0033] The centrifugal pump 32 is installed at an elevation angle of 15-30° with respect to the horizontal plane along its axis, so that the port of the suction pipe 33 is closer to the bottom of the coal slurry tank 1. This allows for more effective suction of the coal slurry deposited at the bottom, avoiding a large distance between the suction port and the bottom of the tank due to horizontal installation. This ensures the suction efficiency of the bottom coal slurry and provides a sufficient material source for subsequent swirling and stirring.

[0034] Furthermore, a fixed support can be installed inside the coal slurry tank 1 to support the suction pipe 33 and the conveying pipe 34, ensuring the stability of the pipeline.

[0035] Furthermore, the centrifugal pump 32 is an immersion pump body, and the centrifugal pump 32 itself, the mounting base 31, the suction pipe 33 and the delivery pipe 34 play a certain role in turbulence, thereby improving the mixing effect of the coal slurry.

[0036] In the embodiments of this utility model, please refer to Figure 2 , Figure 3 and Figure 5 The auxiliary stirring structure 4 also includes a drive shaft 41 rotatably connected to the center of the bottom of the coal slurry tank 1. Multiple stirring blades 42 are fixedly installed on the drive shaft 41 and arranged in a ring. A drive motor 43 is fixedly installed at the bottom of the coal slurry tank 1, and the output end of the drive shaft 41 is fixedly connected to the drive motor 43.

[0037] It should be noted that: the drive motor 43 controls the rotation of the stirring blades 42 on the drive shaft 41, and the operating direction is opposite to the coal slurry swirling direction formed by the swirling structure 3, which disperses the coarse coal particles that have settled to the bottom of the tank and re-entrains them into the swirling zone, thereby achieving the stirring of the coal slurry;

[0038] Furthermore, the stirring blades 42 can be sharpened to crush coarse coal particles falling under gravity into fine particles, ensuring the uniformity of the coal slurry.

[0039] Two sealing gaskets 44 are fixedly sleeved on the drive shaft 41, respectively fitting against the inner bottom wall and the outer bottom wall of the coal slurry tank 1; to seal the gap between the drive shaft 41 and the coal slurry tank 1 and prevent the coal slurry from seeping out.

[0040] Furthermore, to protect the safety of the drive motor 43, a protective cover for the drive motor 43 can be installed at the bottom of the coal slurry tank 1.

[0041] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0042] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A coal slurry tank structure with anti-sedimentation function, comprising a coal slurry tank (1) for storing coal slurry and an auxiliary stirring structure (4), wherein a slurry outlet pipe (2) is installed on the coal slurry tank (1), characterized in that: A vortex structure (3) is installed in the coal slurry tank (1). The vortex structure (3) includes multiple mounting seats (31) arranged in annular array at the bottom of the coal slurry tank (1). A centrifugal pump (32) is fixedly installed on each mounting seat (31) by bolts. The input end and output end of the centrifugal pump (32) are respectively connected to a suction pipe (33) and a delivery pipe (34). The delivery pipe (34) extends upward along the inner wall of the coal slurry tank (1) and is closed at the end. Multiple vertically arranged nozzles (35) are fixedly installed on the delivery pipe (34). The ports of the suction pipe (33) and the nozzles (35) face opposite directions.

2. The anti-sedimentation coal slurry tank structure according to claim 1, characterized in that, The auxiliary stirring structure (4) includes a drive shaft (41) rotatably connected to the center of the bottom of the coal slurry tank (1). Multiple stirring blades (42) are fixedly installed on the drive shaft (41) and are arranged in a circular pattern. A drive motor (43) is fixedly installed at the bottom of the coal slurry tank (1), and the output end of the drive shaft (41) is fixedly connected to the drive motor (43).

3. The anti-sedimentation coal slurry tank structure according to claim 2, characterized in that, Two sealing gaskets (44) are fixedly sleeved on the drive shaft (41) and respectively fit against the inner bottom wall and outer bottom wall of the coal slurry tank (1).

4. The anti-sedimentation coal slurry tank structure according to claim 1, characterized in that, The lower part of the conveying pipe (34) is suspended, and the upper part of the conveying pipe (34) is fixedly installed on the inner wall of the coal slurry tank (1).

5. The anti-sedimentation coal slurry tank structure according to claim 1, characterized in that, The suction pipe (33) is suspended and its port is tilted toward the bottom wall of the coal slurry tank (1).

6. The anti-sedimentation coal slurry tank structure according to claim 1, characterized in that, A removable large mesh filter cover (331) is installed at the port of the suction pipe (33).

7. The anti-sedimentation coal slurry tank structure according to claim 1, characterized in that, The inner diameter of the end of the nozzle (35) away from the conveying pipe (34) gradually decreases, and the nozzle (35) forms a tangential angle of 5-10 degrees with the inner wall of the coal slurry tank (1).

8. The anti-sedimentation coal slurry tank structure according to claim 1, characterized in that, The bottom of the coal slurry tank (1) is fixedly installed with a waste discharge pipe (5) that communicates with the bottom of the tank. The waste discharge pipe (5) and the slurry outlet pipe (2) are connected by a connecting pipe (6). Valves (7) are installed on both the waste discharge pipe (5) and the connecting pipe (6).

Images